C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
C22C 38/12 (2006.01) E01B 5/02 (2006.01)
Patent
CA 2716282
The invention relates to a high-strength pearlitic steel rail with an excellent combination of wear properties and rolling contact fatigue resistance wherein the steel consists of 0.88% to 0.95% carbon, 0.75% to 0.92% silicon, 0.80% to 0.95% manganese, 0.05% to 0.14% vanadium, up to 0.008% nitrogen, up to 0.030% phosphorus, 0.008 to 0.030% sulphur, at most 2.5 ppm hydrogen, at most 0.10% chromium, at most 0.010% aluminium, at most 20 ppm oxygen, the remainder being iron and un-avoidable impurities.
La présente invention concerne un rail en acier à structure perlitique haute résistance présentant une excellente combinaison de propriétés dusure et de résistance à la fatigue par contact roulant, ledit acier étant composé de 0,88 % à 0,95 % de carbone, de 0,75 % à 0,92 % de silicium, de 0,80 % à 0,95 % de manganèse, de 0,05 % à 0,14 % de vanadium, jusquà 0,008 % dazote, jusquà 0,030 % de phosphore, de 0,008 à 0,030 % de soufre, de 2,5 ppm maximum dhydrogène, de 0,10 % maximum de chrome, de 0,010 % maximum daluminium, de 20 ppm maximum doxygène, le reste étant du fer et des impuretés inévitables.
Carroll Robert
Jaiswal Shreekant
Smith Howard Martin
Corus Uk Limited
Ridout & Maybee Llp
Tata Steel Uk Limited
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